package com.example.design.bilibili.facade;

import java.net.PortUnreachableException;

public class Projector {

    private static Projector instance = new Projector();

    public static Projector getInstance(){

        return instance;
    }

    public void on(){
        System.out.println("projector on");
    }

    public void off(){
        System.out.println("projector off");
    }

    public void focus(){
        System.out.println("projector is projector");
    }
}
